Cylindrical Roller Trust Bearings

Ball or rollers are used to prevent or minimise rubbing.Rolling coefficient of friction with steel can be ~0.005 (adding resistance due to seals, packed grease, preload and misalignment can increase friction to as much as 0.125).Good, but some slack is usually present.Moderate to high (often requires cooling).Moderate to high (depends on lubrication, often requires maintenance).